1fdcc5e5c0
RISC-V is a new ISA designed to support computer research and education, and is now become a standard open architecture for industry implementations. This is a minimal set of changes required to run 'make kernel-toolchain' using external (GNU) toolchain. The FreeBSD/RISC-V project home: https://wiki.freebsd.org/riscv. Reviewed by: andrew, bdrewery, emaste, imp Sponsored by: DARPA, AFRL Sponsored by: HEIF5 Differential Revision: https://reviews.freebsd.org/D4445
90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
/* LINTLIBRARY */
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/*-
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* Copyright 1996-1998 John D. Polstra.
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* Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
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* All rights reserved.
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*
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* Portions of this software were developed by SRI International and the
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* University of Cambridge Computer Laboratory under DARPA/AFRL contract
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* FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
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*
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* Portions of this software were developed by the University of Cambridge
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* Computer Laboratory as part of the CTSRD Project, with support from the
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* UK Higher Education Innovation Fund (HEIF).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stdlib.h>
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#include "libc_private.h"
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#include "crtbrand.c"
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#include "ignore_init.c"
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typedef void (*fptr)(void);
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#ifdef GCRT
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extern void _mcleanup(void);
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extern void monstartup(void *, void *);
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extern int eprol;
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extern int etext;
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#endif
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void __start(int argc, char **argv, char **env, void (*cleanup)(void));
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/* The entry function. */
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__asm(" .text \n"
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" .align 0 \n"
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" .globl _start \n"
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" _start: \n"
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" mv a3, a2 \n" /* cleanup */
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" addi a1, a0, 8 \n" /* get argv */
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" ld a0, 0(a0) \n" /* load argc */
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" slli t0, a0, 3 \n" /* mult by arg size */
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" add a2, a1, t0 \n" /* env is after argv */
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" addi a2, a2, 8 \n" /* argv is null terminated */
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" lla gp, _gp \n" /* load global pointer */
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" call __start");
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void
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__start(int argc, char **argv, char **env, void (*cleanup)(void))
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{
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handle_argv(argc, argv, env);
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if (&_DYNAMIC != NULL)
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atexit(cleanup);
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else
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_init_tls();
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#ifdef GCRT
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atexit(_mcleanup);
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monstartup(&eprol, &etext);
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__asm__("eprol:");
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#endif
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handle_static_init(argc, argv, env);
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exit(main(argc, argv, env));
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}
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